Recording pencil



F. L. FELTY RECORDING PENCIL Original Filed June 25, 1923 2 Sheets-Sheet1 v w A f 4 8a n 5" 6 f7? eo Q 0 90 o T o O as O I O 43 .54 I I" N 97""0 F161] '1 5 I r I r I I I I I I I F. L. FELTY Oct. 1z,192s.- I1,603,037

RECORDING PENCIL Original Filed June 25, 19 2 sh 2 Patented Oct. 12,1926.

UNITED STATES FQANKLIN L. FELTY. OF CHICAGO, ILLINOIS.

RECORDING PENCIL.

Original application filed June 25, 1923, Serial No. 647,542. Dividedand this application filed February The present invention relates to arecording pencil for use in tachometer-s or similar instrumentalities,and has particularly to do with the arrangement of the writing bed orsurface used therewith, and to the refinement and improvement of themechanisms of such devices.

The objects of the invention include the production of a recordingpencil for indicating by a continuous line the effect of specificexternal conditions upon an indicating instrument in which the pencil isused.

Other objects of the invention are the provision of an improved assemblyfor a re cording mechanism, an advance in structural details thereforfor simplifying the production and useof such instrumentalities, arefinement of parts and st-ructu 'al details for the attainment ofhigher efficiency, and generally, a novel writing member for use with atape-advancing device.

These, and such other objects as may hereinafter appear, are attained bythe novel construction, combination, and arrangement of the variousparts of the device, all of which are fully disclosed in thespecification which follows and in the two sheets of drawing heretoappended and made a part of the specification, and in which Figure 1 isan enlarged top view of the device and a surrounding mechanism,comprising adjacent parts of a tachometer;

Figure 2 is an enlarged detail in elevation of the actuating means forthe recording pencil taken on the line 2-2 of Figure 1;

Figure 3 is an elevation of the recording pencil taken on the line 3-3of Figure 1;

Figure 4 is a detail of the indicator and adjacent scale; and

Figure 5 is a detail taken on the line 5-5 of Figure 3 and looking inthe direction of the arrows there shown.

Like reference characters are used to designate similar parts in thedrawings and in the description which follows.

Reference should be had to my eopending application for patent, SerialNumber 647,- 542, filed June 25, 1923, and from which this applicationhas been divided. As described and shown in said copending application,it is usual to provide a casing or housing for the recording pencil andthe mechanisms associated therewith. A connecting member is arranged insuch housing for engaging a flexible or other shaft geared to a rotatingpart of the device, the speed and travel of Serial No. 6,339.

which is to be measured and recorded. Any suitable connector member maybe provided between such flexible shaft referred to and the speedindicating mechanism shortly to be briefly described, and which iscontained wholly within the case.

In the copending application, a case having a. removable front 30 isprovided. To removable front 30 is secured a platform or base 3'? uponwhich most of the mechanism of the device disposed. Several openings areprovided in said front 30 for viewing the recording tape and speedindicator, and other indicators, but one only of these, a recording tapeand speed indicator window 31, need be mentioned in this application,said opening being covered with a sheet of glass or other suitabletransparent material. An index: 36, declaratory of thc'spec'd of thevehicle upon which the device is used, appears at one end, of window 31.

As bercinaluive indicated, most of the mechanism is disposed upon aplatform or base 37 having an angular portion or flange 38 secured tofront 30 by rivets or other suitable fastening means, the platform 37being slightly off-set from said front 30 by bosses 39' or ribs, or byremovable bars. To base 37, brackets, preferably also anchored to flange38, are provided for various rotating parts.

Suitable shafts and gears are provided for translating the rotation ofthe flexible shaft connectedto the vehicle upon which the instrument isused to the several mechanisms which may be associated with therecording pencil, all of which shafts and gears are set forth in thecomplete instrumentality described in said previously mentionedcopending patent application.

It is in said application disclosed how gearing is arranged to drive ahorizontally disposed spindle 48 journalled in brackets carried upon theplatform 37. Upon the right hand extremity of said spindle 48, as shownin Figures 1 and 2, is a head 50 having opposed radial lugs. Dependingfrom head .50 and from the oppositely disposed lugs thereon, are ballgovernors 51 secured by bars 50 having pivot connections in said lugs.Increment of speed causes the balls 51 to fly outwardly from shaft 4C8wncreby to horizontally move a sleeve 52 upon said shaft 48 and linkedto said balls 51 by the members 51 pivoted at each end, such movementbeing against the resistance of a coil spring 53 disposed intermediatehead and sleeve 52. A tensioniug sleeve 5i is disposed upon head 50, andby rotating said sleeve 5%, upon threads on the shaft or spindle spring53 may be compressed o releaseth t icreby determining the rotatire speednecessary to force outwardly the balls any predetermined dis tance.

it rack slidably disposed in brackets upon platform 37. but here notshown, has at one extremity a roller bearing 57 adapted to be seatedsaid sleeve 52, whereby t impart a line-a d'iplacement of said rack 55with the changing of the speed with which spindle id is revolved. itrock-shaft 58 is arranged transversely of base or platform 37. andjournalled "in brackets or plates secured to the latter. Said shaft isoscillated by a pinion 59 at one end thereof in engagement with rack Atthe opposite end of shaft 58, an arm (39 is fixedly secured thereto, andby a linlr (31. a pencil carrier (32 having a somewhat triangular flatbody and supporting a needle or indicator at one side, is reciprocatedOi) vertically upon guides or tracks 64;, as is shown in Figure 3. Thetracks G l may be found by bending a rod into a J-shape and space bars6% secured to front may be employed to rigidly secure such track 64:.The movement of link 61 is mathematically calculated with respect tosleeve 52 and the intermediate parts so that the movement of pencilcarrier 62 along track 64 is directly proportional to the speed aboveZero at which the Vehicle upon which the device is used trarels. isclearly indicated. the con nccting members intermediate the rock shaft138 and pencil carrier (32 are adjustable to enla g'e the sphere ofmovement of said pencil carrier. On one side of carrier 62 are twogrooved bearings and upon its other szde a single grooved bearing forriding on tracks 64:.

Pencil carrier 62 comprises a long narrow tube 65 adapted to receivelead 65% such lead being common in the art. Said tube 65 has an L-shapedslot 6-6 extending rrom the outer end thereof substantially to ITSinnermost extremity. The outer end of said slot (36 is enlarged at Afollower for such lead comprises a ball 67 (see Figure 1) disposed insaid tube and removable therefrom through the enlarged portion (56, andsaid follower is actuated by pressure exerted thereupon by a pin 68,from which said ball depends, said pin 68 projecting through said slot(36. Pin 68 at its ot er end is pivotally secured to a pair of pivotedarms 69- and 69 the latter being rotatably or pivotally mounted upon aboss 70 on the pencil carrier Intermediate arms (59 and (39, a spring 71may be em ployed for creating linear pressure againstball 67, the usualway of mounting said spring Tl being to anchor one end upon or about theboss 70 and allow the free end to impinge one side of arm 69.

For convenience in loading pencil tube (5.3, the enlarged section (3(3of the slot 6 is usually placed in an elbow of tube as shown so thatsuch extension or elbow provides a seat for the ball (3? when the latteris withdrawn from pressing upon the lead in tube 35. Pin 68 and the arm69 project outwardly in such a degree when the ball 67 is in said elbowthat said arm (l9 will engage or impinge against the housing for thedevice when cover 30 is about to be slipped into such case whereby toprevent the at tempted closing of the cover 30 upon the casewhen thepencil is not in a positive operating position. The link 61 is providedwith a plurality of adjustments with res; ect to pencil carrier 62 andlever so that the movement and position of said pencil carrier 62 may beaccurately adjusted to meet practical requirements and manujlacturingnecessities.

Upon the platform 37 is situated a tape winziling mechanism, the tapecarried there by being marked by the lead in tube 65. Upon base 37 isdisposed a spindle (not shown) adapted to receive av roll of suitablerecording paper or tape 88, which paper is first-threaded about a guidepulley 89 and thence onto a spindle 90 driven by a gear (not shown) andupon which a shell 91 having at its upper end a plurality of pins ornotches 92 is locked into engagement by a pivoted handle or latch member92 preferably upon the axis of spindle 90 and adapted to be foldeddownwardly intermediate two of pins 92 when the device is in an operableor recording position. (See figure 1.) Latch 93 is adapted to projectupwardly sutliciently that when shell 91 is not locked upon spindle 90it presents an obstacle engaging the instrument case whereby to preventfront 30 from being secured thereto.

After passing about shell 91, the tape 88 is again brought to bear uponguide pulley 80 and the portion of tape pulled thereover is drawn acrossopening 31 and to a second guide pulley and from thence to a receivingspindle or winding member, neither of which is shown. Pencil carrier andtube 65 are so positioned that the point of the lead carried by saidtube 65 is brought to bear upon the outermost portion of tape 88 as itpasses over guide pulley 89 for the second time, thereby recording uponthe tape 88 an indication of the speed of the vehicle which marl:becomes immediately visible through opening 31. It will be instantlynoted that the pencil impingement i had upon tape 88 where it comprisesa double thickness with the result that its im ression is a more clearlydefined mark. Suitable means are employed to equalize the movement oftape 88 between the several spindles mentioned.

A recording device comprising a body provided with a tube having a slottherein and an elbowed section, a bar of lead in said member agai nstsaid lead.

FRANKLIN L. FELTY.

tube, a follower for said lead comprising a ball member and a pluralityof levers, said elbowed section forming a seat for said ball member whensaid tube is being reloaded, and a spring upon said body and engagingsaid levers for urging said ball

